Receiving telegraphic and telephonic impulses simultaneously.



No. 894,836; PATENTED AUG. 4; 1908.

I I. KITSEE.

RECEIVING TELEGRAPHIU. AND TELEPHONIG IMPULSES"SIMULTANEOUSLY,

'AP P-LIOATION FILED JUNE 21, M06.

UNITEDsii-Arns PATENT OFFICE.

lSIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO WILLIAM J. LATTA, or PHILADELPHIA, PENNSYLVANIA.

RECEIVING- TELEGRAPHIO AND TELEPHONIC IMPULSES SIMULTANEOUSLY.

Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed June 21, 1906. Serial Roi 322,726.

To. all whom it may comm;

Be it known that'I, Isin'on KrrsEE, citizen of the United States, residing at Philadel phia, in thecounty of Philadelphia and State of Pennsylvania, have invented certain new and useful Im rovements in Receiving Telegraphic and. elephonic impulses Simultaneously, of which the following is. a specificatlon.

. My invention relates to an im rovement in the simultaneous receiving of t'e eg'raphic and telephonic impulses. Its object is, to provide an arrangement'whereby telegraphic and telephonic im ulses ma be simultaneously received wit out inte ering with each other.

The drawing represents in 1 diagrammatic view my inventlon. 4

1, 1, is the line of transmission; 2 is a receivingv device here shown as a polarized relay; 3, 3, are condensers; 4. is the primary and 5'is the. secondary of an inductorium;

and 6 the telephonic receiver. The electromagnetic devlce 2 is transparent to a telegraphic impulse,'but is opaque to the telephonic impulse; whereas, the condensers 3,

s 3, being opaque to the telegraphic impulses are transparent, to the telephonic impulses.

But I have found by actual experiments that an arrangement wherein only condensers. are placed in shunt with the receiving device, the telegraphic impulses or rather their inductive influence greatly destroys the value of the telephonic waves. After careful tests .and difi'erent arrangementsflt Was'establjshed by me that if the rimary of an inductorium is placed in the s unt, in conjunction-with the condensers and the secondary connected to the receiver, the disturbances due'tothe telegraphic im ulses are greatly lesened and often entire y obviated, and I make use of this arrangement in simultaneously telegraphing and telephoning over lines of trans- .mlSSl On.

torium, the secondary of which was variable, that is, the coil was divided into six sections, each section consisting-of thirty ohms, so that if all sections were replaced in series, 'the whole coil represented a value of 180 ohms, but if all were placed in'multi le,

the coil represented a value of only test in which I obtained the best results, the primary had a value of about six ohms and the secondary of about five ohms, thus reversing the'order of ratio of resistance.

Having now described my invention, what I claim as new and desire to secure'by Letters Patent is:

' 1. ,In'a line of transmission, a tele aphic receiving device inserted in series t ereto, condensers shunting said receiving devlce, in combinatlon with an inductorium, one

coil therefor connected to said condensers and forming part of the shunt around said receiving device, the other coil connected to a tele honic receiver.- f

2. n combination with a line of transve ohms, and it was found that the best results mission, means to simultaneously receive telephonic and telegraphic impulses, said means embracing an electro-ma'gnetic device inserted in said'line, a shunt for said .said shunt, one coil of said inductorium con-.

nected to a telephonicreceiver, the second coil connected with the interposition of condensers in said shunt.

3. Means to simultaneously receive telegraphic and telephonic messages, said means embracing a telegraphic receiver insertedin series as to the line for the telegraphic messages and embracing a shunt around said receiver, said shunt embracing condensers and one coil of an inductorlum, a telephonic receiver, said receiver connected to the second coil of said inductorium.

4. Means to simultaneously transmit telegraphic and tele honic impulses, said means embracing for t e telegraphic impulses an electromagnetic device inserted in the line of transmission and embracing for the telethe inductorium connected to phonic impulses a, telephonic receiver, an mductorium and condensers, the primary of the telephonic receiver, the secondary of said 'inductoriuni connected in conjunction with said condensers inshunt to said electromagnetic device;

I In testimony whereof I affix my signature 111 presence of two Witnesses.

'ISIDOR KITSEE.

Witnesses:

EDITH R. STILLEY, MARY 0. SMITH. 

